private static ulong CalculateEstimatedUserConsumption(UserInvoice invoice, ulong realUserConsumption, ConsumptionValue commonConsumption)
{
Contract.Requires(commonConsumption != null);
decimal estimatedUserConsumption = Convert.ToDecimal(commonConsumption.Estimated * realUserConsumption) / Convert.ToDecimal(commonConsumption.Real);
invoice.GetConsumption().Estimated = Convert.ToUInt64(Math.Round(estimatedUserConsumption));
return(invoice.GetConsumption().Estimated);
}
private static void FineGrainEstimatedUserConsumption(IEnumerable <UserInvoice> userInvoices,
ulong totalCalculatedEstimatedConsumption, ConsumptionValue commonConsumption)
{
long estimatedConsumptionDiff = Convert.ToInt64(totalCalculatedEstimatedConsumption - commonConsumption.Estimated);
foreach (var userInvoice in userInvoices)
{
if (estimatedConsumptionDiff > 0)
{
userInvoice.GetConsumption().Estimated--;
estimatedConsumptionDiff--;
}
else if (estimatedConsumptionDiff < 0)
{
userInvoice.GetConsumption().Estimated++;
estimatedConsumptionDiff++;
}
else
{
return;
}
}
}
/// <summary>
/// Calculate consumption sum
/// </summary>
/// <param name="consumption"></param>
/// <returns></returns>
public static ulong Sum(this ConsumptionValue consumption)
{
Contract.Requires(consumption != null);
return(consumption.Estimated + consumption.Real);
}
